Answer:
Point C which is 1.
Step-by-step explanation:
A = -6
E = 8
M = (A + E)/2
M = (-6 + 8)/2 = 2/2 = 1
The midpoint is 1 which is point C.
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Triangles are similar ,
Thus :



Inverse both sides

Multiply sides by 6



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I believe it is corresponding to the value of x in type of situational problem.
Try dividing the surface area of the wall by 6.